Link bridge for ophthalmic mountings



Dec. 16, 1930. H. H. STYLL LINK BRIDGE FOR OPHTHALMIC MOUNTINGS FiledDec. 15, 1927 Patented Dec. 16, 1930 uni-"ran STATE-S Parent v.rice

HARRY H. 'SIYLL, or sournnarnen, ivmssaonnsnrrs LINK BRIDGE FOROPHTHALMIC ouiirIivGs Application filed December 15, 1927.Se'ria1 No.240,149.

This invention relates toimprovements in bridge means for connectingthelens frames; of ophthalmic lenses and has particular refer ence toimproved means for regulating the distance between the respectivecenters of said lenses.

The principal object of the invention is to provide a bridge member foranophthalmic mounting which will allow the lens holding members tobefolded one with respect to the I Another object of the invention is toprovide a bridging member for the lens holding members of an ophthalmicmountingwhich may be flexible or foldable as well as adjustable as tothe distance between the respective lensholding members. I I

' Other objects and advantages of the invention will be apparent fromthe following description taken in connection with the accompanyingdrawings audit will be understood that many changes maybe made in thearrangement of parts and details of the construction without departingfrom the spirit of the inventionas expressed in the accompanying claims.I, therefore. do not wish i to be limited to the exact details ofconstruction and arrangements of parts shown'asthe preferred forms onlyhave been shown by way of illustration. a

In that type of ophthalmic mountings usually known asprotective gogglesit has been customary to connect the two lens holding members by meansof a chain so that simply by twisting one lens holding memher withrespect to the other the chain will be twisted and shortened thuschanging the distance between the two lens holding members. This hasproved a very useful and practical device. It has, however, oneoutjstanding disadvantage, namely that when section showin member 7 istheswive l member 9 having a the mounting is taken off the. face, of thewearer the chain untwists and the distance between the lens holdingmembers is changed, In other words, the adjustment for-the. pupillarydistance of the wearer is lost so that this 1 pupillary distance has tobe adjusted by twisting the chain each time that the wearer puts on themounting. I

. In my improved device I preserve the flexibility of the chain bridgebut I provide im j proved means therein bywhich the adjustment forthepupillary distance is maintained and not lost each time the mounting istaken off the face. .VVith my device, therefore,v the lens holdingmembers maybe folded with respect one to the other just as with theprior art chain bridge and the pupillary distance ofthe mountingbemaintainedr Referring to the drawings Fig. 1 is "a front viewpartially in crossthe device inv its outermost adjustment; I I

Fig. 2 is a view similar to Fig-. 1 showing thebridge adjusted in,its'innermost position FigBis a top view of Figs. 1- and 2;

Fig. 4 is across section on lined- 4 of Fig.1; f

Fig. 5 is a partial View. similar to Figs; 1 and 2lshowingamodification;

'Fig. 6 is a cross section on line 6 6 of '80 Fig.5, Referring to thedrawingswherein similar reference. characters denote corresponding Iparts, the lenses 1 are mounted in and ,held'in the lens-frames 2,"which framesmay be'in 8 the forin'of an eye cu along the line 3 to fitthe face, as shownin ig. 3. It will beunderstood that any convenientform of, lens holding rim may be usedin connectionwith this devicei' dgrepresentsjtheheadband or straps by which the device is held in 'placeon'the face, ,on each lens holding member is,

'ast aple .or-hook5 which is preferably bent out as shown in Fig. 3 sothat thebridgememher maybe thrownoutto'clear the nose. Se-

cured in the staple 5is the link 6 and secured I to the link 6 islthescrew member? having an eye 8 secured in the link 6. Over the screwright'and lefthand'thread on its insideand over the swivel member 9 isthe nose engaging pad 10 preferably made of soft rubber tubing.

The operation is as follows; When the swivel member 9 is rotated thescrew members 7 are either advanced towards each other or separated onefrom the other, depending on the direction in which the swivel member 9is rotated. In this way the lens holding members may be brought closertogether or farther apart and may be adjusted so'that the center of thelenses 1 will lie before the 1 center of the pupil of the eye of thewearer and the nose engaging member being of a soft rubber presents asoft bearing pad for 1 'contactwith the skin ofthe nose.

This invention provides not only means for changing the distance betweenthe lens holding members 2 but provides through the staple 5, the ring 6and the eye 8 flexible means by which one lens'member may be folded withrespect tothe other.

Fig. 5 shows a slight modification comprising the lens holding members'2, the staples '5 and the ring 6. On the left hand side is shown a.swivel bolt 11 having the eye 12 and the turned over end 13, and on theright hand side the screw bolt 14 having the eye 15 fitting in the ring6, which bolt is screw threaded and hasa turned-over head on the end 16.The swivel bolt 11 and the screw member 14 are connected with the swivelspanner 17. The operation is as follows :VVhen the swivel spanner 17 isturned the screw bolt 14 is either drawn into or moved out of the swivelspanner 17 thus changing the distance between the lens holding member 2whether or not it is drawn in or moved out depending on the direction inwhich the swivel spanner is turned. This swivel spanner 17 may becovered with a rubber tube as in thecase of Figs. 1 and 2. 7

if'desiredthe member 9 on the swivel spanner 17 maybe knurled so thatwhen the "'rubbertube' 10 is' pushed thereover it.

will tightly engage thereon, or it can be 1 made smooth as desired. Alsoif desired ing one lens holding member tobe folded p with respect to theother.

the device may be used without the cover 10.

'similarto'themember17 in Fig. 5 so that the ends of the'screw' members7 may be offset to prevent themcoming' out'of the member 9.

From thejforegoing description it will be andineiipensive means forproviding a bridging member for ophthalmlc mountlngswhich In Figs. land2 the member 9 may be made seen that I have provided simple, eificient55* from each other each having a terminal eye, 1

an attaching member on each lens holding member having an eye linked inan eye of one of said link rods for universal movement and threadedmeans adapted to change the distance between the facing ends of the tworod links.

2. In a'device of the character described for use in combination with apair of lens holding members, alink. ,holding member fixedly attached toeach lens holding mem-.

ber, a loose link attached to the link holding members, link rods havingtheir terminal endsfacingtandseparated from each other and having eyeportions connected for free movement with the looselink, and threadedmeans adapted to change the distancebe- HARRY H. STYLL,

maybe adjusted 'as to'the pupillary require V ments at 'the's'ame timebeing flexible allow- Having described my invention, I claim:

1. In Qap device of the character described foruse in combination with,apair of lens holding members, a pair of link rods having theirterminal ends facing and separated

